Fire-extinguisher.



A. G. ROWB. PIRE EXTINGUISHER. APPLICATION-FILED JUNE l2. 1912.

all portions of the contents, from the first to.

tinguishei 3,-., which invention is fully entran saintes Param soFFloE,

ARTHUR C. ROWE, 0F NEW YORK, N. Y., A. C. RGWE d: SGN, OF NEW YORK, IN. Y., FIRM COMPSEB 0F ARTHUR C; ROW@ N53 KENNETH l?. BOWE.-

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Specification of Letters :intent Application led J une 12, 1912; Serial lilo. 763,255.

To all 'whom i may concern Be it known that I, ARTHUR C. Rown, a citizen of the United States, and a resident of the city, county, and State of New York, (whose post-ottica address is 280 Broadway, New York city, New Yorin) have invented a new anduseful Improvement inFire-EX- set forth in the following specification.

The invention relates to lhand-operated extinguishers for discharging carbon tetrachiorid or other fire extinguishing duids.

The object of the invention is to rovide a simple, compact, durable, and abso utely reliable apparatus, which `will discharge a uniform and continuous stream when in use, and will prevent loss of its contents when not in use.

Broadly stated, the invention comprises a chamber having a piston actuated by screwpressure, so as to discharge with equal force the last.

The invention comprises also improved means for sealing the contents against loss by leakage or evaporation. A

' The invention comprises further certain features of construction and arrangement to be hereinafter pointed out and claimed.

The inventiony will be best understood by reference to the annexed drawings that illustrate a preferred embodiment thereof.

In these drawings-Figure 1 is a vertical section through one embodiment of my invention, shown as installed upon suitable brackets on a wall, and with its discharge orifice sealed; Fig. 2 is a horizontal section through the line 2 2 of Fig. 1; Fig. 3 is a vertical section of the forward end of the apparatus showing the discharge orifice as opened; and Fig.- 4 is a vertical section through the upper end of the apparatus.

1 represents the chamber, referably an elongated cylinder, closed at the rear (top) by a centrally-apertured cap 2 threaded hereon, and at the front (bottom) by a coresponding centrally-apertured cap 3.

e is a longitudinally disposed. shaft carryin a thread of comparatively coarse pitc to constitute the feed-screw. Onev end of this shaft is journaled in the aperture through the uppercap'2, and is .shown as carryin onits outer, rejection-the hand-k dpef tlleslietttermi` t wheel ,5- he @that-sa.

thereto, so that a circular t or natos -in a reduced portion with a cone-tip 6,

extending into 'the aperture in lower cap 3,

Ia screw-threaded nut engaging the feedscrew, and a piston pro er carried yieldingly by the feed-nuthere the chamber is cylindrical, means are provided, such as an eccentricallymounted disk, to prevent the `nut turning axially7 with respect tothe casing. The nut consists of the: internally screw-threaded sleeve 12 (in which the feedscrew turns) carrying the flange-plate 13.

14 is the 4centrally-apertured piston-plate having anexternally-threaded lip around the aperture, and 15 is a packing-box ring engagicn said lip, for inclosing a packinggland, the piston sliding freely but snugly 'over 1the sleeve 1 2.

16 represents guide-pins, riveted in thev plate 1,4, and telescoping in guldes in the plate 13. A coiled spring 17 surrounds each Iguide-pin, tending to separate thefplates 13 and 121 18 is the washer, preferably a bagof asbestes containing glycerin, carried at the front (bottom) of the plate 141, as by means of the plate 19 and screws'20; and prefyerably the outer rim of this bag is downturned as indicated in Fig. 1, the .area of plate 19 being sufficiently reduced for that purpose. i

21 represents a circular boss, located eccentrically at therear (top) of the plate 13;

and A22 is the eccentric disk journaled there- .,on. In this disk is the guide-slot 23 curved concentrically of its center of rotation (the center of boss 21); and 24 isa guide-stud carried by the plate 13`and protruding into this slot. Asystlated, the casing 1 is referably a cylinder, and the feed-screw t is preferably located. @wally-with respect i .SEQD mi ht ,he egt .eteg to-1? tate wit yhe siiaft 4 and tum @51,17 .cylindrical cSlng; 1

resented ceses, 191e.

(without being advanced along the feedscrew). But, by means of the eccentric disk 22,this is prevented, and the nut and piston caused to advance. Upon rotating the feedscrew, the nut and its plate 13 tend to turn with it, but the eccentricity'of the disk 22 prevents the latter from turning at all,

tinuously shifting his grip on the wheel) isintermittently turning the screw.

A nipple 25, screwed in the end of the nipple 8, surrounds the plunger v7, to inclose a packing-gland. The rear (upper) end of the plunger is enlarged, and on the outside has longitudinal guide-grooves engaging the pins 27, to prevent it turning axially; and on the interior has a circular recess screw-threaded to receive the end of the feed-screw 4, and terminating in a conical seat to receive the cone-point 6,-which latter is thus adapted to close the outletorifice through the plunger.

In the position indicated in Fig. 3, the outlet-orifice vis open, the point 6 being out of contact with its conical seat. In order to close the orifice, the plunger 7 is first shoved inward, as by hand, until its internal screwthread can engage the thread on the feedscrew, whereupon the latter is turned two or three revolutions, thus drawing the' plunger inward until its conical seat engages the tip '6 of the shaft 4, as seen in Fig. l, which completely seals the outlet..

The apparatus is filledwith carbon tetrachlorid or any othersuitable fluid, through the opening that isclosed by the screwthreaded plug 28. Preferably a small amount of glycerin may .-be introduced,

which (owing to its lighter specific gravity) will rise to the top and form a iilm as 29;

' the" piston is patently concav.

curve-indicated in Fig so that by maintaining the apparatus inthe vertical position indicated vaporization of the tetrachlorid and possib e escape past the plunger at the top, are prevented.v As a fur= ther precaution, -to prevent. evaporation` loss atthe upper end ofthe apparatus, and tov prevent the formation of av'uum when advancing, plate or disk 3 0 ofresilient metal, 'permaf 'to provide the*.""annular @entrati continuous jet or stream.

sleeve `si1rroundin `I 'provide a thin-v (of cork orrubber) located upon the stem of the shaft 4, while the outer edge thereof extends adjacent a similar ring 32 adjacent the casing 1. 33 is a vent-hole through the upper cap 2. When the piston is retracted (to the top of the apparatus), this curved plate 30 is somewhat flattened out against its natural tension, thereby forcing its inner and outer edges into the gaskets 31 and 32 respectively, and it may also be forced against the vent 33. Asfthus illustrated in Fig. 4, the top of the apparatus is completely sealed when not in use;

but as soon as the feed-screw has been turned suiiiciently to advance the nut, the natural resiliency of the late 30 withdraws the edges thereof out' of) gaskets 31 and 32, thus ermitting air to enter in the rear ofthe pistonto prevent a vacuum.

In using the apparatus, it is taken from contact with the its brackets and pointed toward the coni fiagration, and the feed-screw rotated in the proper direction for advancing the piston; the first few revolutions force the plunger 7 downward, thus openin the outlet, the springs 17 yielding su ciently to permit the screw to make a few rotations without advancing the piston proper (14-18) against the non-compressible liquid; thereafter, in the same further revolution'of the hand-wheel direction ladvances the piston and forces the contents through the outlet,

a distance of thirty feet, more or less, in a I have thus described my invent-ion at considerable detail, but only for the sake of clearness, since the-invention isnot limited to the precise construction and arrangement set forth. Modifications of construction and of arrangement maybe resorted to, the parts may some features used to the exclusion of others, without departing 4from the spirit of my invention.

Having thus claim:

l. A tire-extinguisher comprising. acyldescribed my invention, I

be inverted or transposed, andV inder having an. opening in its outer end, a

hollow plunger keyed to slide snugly in said opening and-interiorly screw-threaded at its inner end, a feed-screw extending longitudinally'in said cylinder and adapted to.

engage said screw-threads -when the pluri- 'ger is forced rearward, ascrew-threaded said feed-screw and carrying a {lange-'p ate, 'a piston-'plate `telesci )pin'g upon said sleeve, springs interposed between said plates a piston-washer .carried upon said pistonpiate, and 'aplate lvo'ted axia'fil in sad cylinder. t

4ifireextinguisher comprising a chaine @@elilly uponsaid Hangeplate (ir-Rye- 'venting said s'leeveand'pistonjfrom turning hollow plunger keyed to slide snugly in said opening and interiorly screw-threaded at its inneriend, a feed-screw extending longitudinally in said chamberoand adapted to engage said screw-threads when the plunger is fo-rced rearward, surrounding said feed-screw and carrying a flangeplate, a piston-plate telescoping uponsaid sleeve, springs interposed between said plates, and a Vpiston-washer carried upon said piston-plate. v

3. A fire-extinguisher comprising achember,.a piston tted therein, a feed-screw for propelling said piston,y a ,hollow plun er fitted in the forward end of said cham er and having a threaded seat in its inner end adapted to engage the extremity of said feed-screw wherebythe outlet-orifice in said plunger may be forced against or away from the end of said feed-screw.

4C. A fire-extinguisher comprising a cylinder having an outlet-orifice, a feed-screw extending longitudinally nut traveling along said ton4 carried yieldingly in front of said nut and a disk-mounted eccentrically upon said nut to preventt'he latter from turning axially 1n said cylinder.

5. A 4fire-extinguisher lcomprising a cyl,

inder having an outlet-orifice, a feed-Screw extending longitudinally in said cylinder, a nut traveling along said feed-screw, a ,piston carried yieldingly in front of said nut,

a screw-threaded sleevev and means to prevent said nut turning axially in said cylinder. f

6. A fire-extinguisher comprising a charnloer for containing a fire-extinguishing fluid and provided with an outlet, a hollow plunofer sliding snugly in said outlet, mechanism for forcing said fluid out through the bore of said plun er, and'means actuated by said mechanism or sealing and unsealing said bore.

7. A fire-extinguisher comprising a cha-niber having an outlet-orifice, a feedlscrew extending longitudinally in said chamber, a nut traveling along said feed-screw, and ,a

nut.

8. The combination with a re-extinin said cylinder, a' feed-screw, a pis.

guisher comprising a chamber having a piston andfmeans for advancing the latter, of vai seal consisting of a transversely curved in the rear of said piston and adapted to be ,lattened b the piston in its rearward postion to orce the edges of said washer In testimony whereof -I haveo'signed this specification in the presence of two subscribing witnesses. l .t n ARTHUR 0.-.RoWE.

Witnesses l RALPH L. SCOTT,

, i WILLARD H. HARTING.

Copies ot this patent may be obtained for ve cents each, by laddressing' the,l Commissioner of Patents,

Washington, D, Q.

washer'of resilient material located loosely' .'into'icontact with the walls of the chamber.'

piston carried yieldingly in front of said I 

